Relay.



F- B. COOK.

RELAY.

APPLICATION FILED DEC. 14, 1914.

1 1 85,37 1 Patented May 30, 1916.

a IEII'WAIIIII UNITED STATES or I FRANK B. COOK, OF CHICAGO, ILLINOIS, ASSIGNOB, T0 FRANK B. 060K COMPANY, Elli CHICAGO, ILLINOIS, A CORPORATIQN DIE ILLI'NQIS.

RELAY.

Application filed December 14, 1914.

the following is a full, clear, concise, and

exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to relays and has for one of its obyects the prov1sion of improved means for adjusting the normal or idle posi-' tions of floating spring contacts and has for another of its objects the provision of an improved armature structure portion that engages the spring mechanism for actuatingit.

As is Well known to those skilled in the art, the normal distance between complemental contacts of a relay has been determined by bending the floating contacts or the backing springs thereof, a process which is slow and uncertain.

In accordance with one object of my invention ll provide a bodily movable abutment for each floating spring contact, the set of the spring contact that is to be ad justed being such as to]; enable this contact to follow the abutment 'inits movement of adjustment whereby the position of this spring may readily be determined merely by changing the position of the abutment. In the preferred embodiment of this feature of the invention the abutment is in threaded connection with a threaded shaft that; extends transversely of the springs, the position of the abutment being readily changed mereby by turning it upon its shaft. In order to insure the adjusted position of the abutment I provide a. locking device which includes inter-engaging portions carried by the floating spring contact and the adjustable abutment therefor. There are relays which include a plurality-of sets orpairs of contacts pertaining to different circuits and I adapt my invention to such. relays by elongating the threaded shaft and providing thereupon as many abutments'as there are floating spring contacts, one abutmentfor each of such contacts.

In order to actuate the spring mechanism 1 provide a Wedge or cam upon which a portion of the spring structure is adapted Specification of Letters Patent.

Patented May 3d, 191%..

Serial No. 871 ,1535.

to ride to effect the movement of those springs that is to be occasioned as a consequence of the energiaation of the relay. The armature structure also carries another Wedge symmetrically arranged Withrespcct to the first and Whose function is to beengaged by the spring structure to limit the extent to which the armature may be re tracted.

I Will explain my invention more fully by reference to the accompan vin awing h \i. showing the preferred embodiment thereof and in Wl1lCi1- Figure 1 is a longitudinal sectional view; Fig. 2 is a plan view of the structure appearing in Fig. 1, certain parts being omitted for the sake of clearness; Fig. 3 a front view of the structure; Fig. -l illustrates the threaded shaft and a plurality of adjustable abutments mounted thereupon; and Fig. 5 illustrates the interrelation of the armature structure and the spring mechanism whereby the armature may operate the spring mechanism and may be limited in its retractile movement.

Like parts are indicated by similar characters of reference throughout the different figures.

The electro-magnet of the annunciator may be of any suitable or preferred con-- struction, the aununciator shown including a magnetic core 1, a. magnetic yoke 2, an armature 3 mounted upon the forward end of the yoke 2, and a winding ldisposed between the spool heads 5, 6 that are located upon the ends of the core. The yoke 25 also supports a plurality of sets of spring contacts which include master spring contacts 7, 8, 9, and 10 which are respectively provided with complemental and floating; contacts l1, 12, 13, 14, 15 and 16. The yoke 2 is also illustrated as carrying Winding cir' cuit terminalsl'l, 18, 19 and 20, two pairs being required if the winding of the relay is made up of two coils, though the number and disposition of these circuit terminals are immaterial so far as my invention is Abutments are in threaded connection with the shaft there being one abutment for each of the floating contacts As the shaft 22 is disposed transversely of the springs the'normal or'idle position of the required only with respect to the portions of the floating contact springs that they engage. Thus the relative positions of each set of floating and master contacts may be very quickly and accuratelydetermined. In

order to insure the maintenance of the adjusted positions of the abutments they are desirably made in the form of disks in each of which there is provided a peripheral row of holes 24 which are adapted to receive pro-. 1ect1ons 25 formed in the floatmg contacts The peripheries of these disk abutments may be grooved or knurled to facilitate the turning thereof.

The master contacts 8 and 9 carry cam rollers 26 and 27 at their forward ends,.

these rollers being upon opposite sides of an actuating cam 28 mounted at the upper end of the armature structure and desirably in the form of a cone. Vhenever the armature is actuated the base of the cam cone 28 is moved toward the rollers 26 whereby these rollers are spread apart to actuate the master contacts 8 and 9. The master contacts 7 and 10 also carry rollers 29 and 30 which engage the master contacts 8 and 9 whereby the master contacts 7 and 10 are spread apart when the master contacts 8 and 9 are spread apart. The armature structure also carries a cam 31 which is symmetrically arranged with respect to the cam 28 and is also desirably cone shaped, these two cams being preferably co-axial, the cam 31 by engaging the rollers 26 serving to limit the extent to which the armature may be retracted when the relay is deenergized.

iVhile I have herein shown and particularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made without 1. A relay including floating and ma ster.

contacts; a bodily transversely movable abutment for the floating contact to determine its normal position; and a holding device for maintaining the abutment in adjustment which includes interengaging formations provided upon the abutment andthe floating contact.

2. A relay including its armature; switching mechanism to be operated by the armature; and symmetrically related cams carried by the armature and between which the switching mechanism is engaged, one cam for operating the switching mechanism and the other for enabling the switching mechanism to limit the retractile movement of the armature. r

3. A relay including its armature; switching mechanism to be operated by the arina ture; and symmetrically related co-aXial conical camsthat slope toward each other with both of which the switching mechanism is engaged, one cam serving to operate the switching mechanism and the other serving to enable the switching mechanism to limit the extent to which the armature may,

be retracted.

In witness whereof, I hereunto subscribe my name tlns first day of December, A. D.

FRANK B. COOK. Witnesses:

E'r'ra L. WHITE, G. L. Cease.

60p!" of this patent may be obtained for five cents each, by addressin gthe Commissioner of Patentl, Washington, E13. 

